The Middle Ordovician of Oslo Region, Norway. 34. The type Nakholmen Formation, (Upper Caradoc) Oslo, and its significance.
Reference:
Harper,D.A.T. et al. (1984)
The Middle Ordovician of Oslo Region, Norway. 34. The type Nakholmen Formation, (Upper Caradoc) Oslo, and its significance. Norsk Geologisk Tidsskrift,(Norwegian Journal of Geology)
Vol. 64 # 4 P. 293- 311